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RULES OF PRACTICE IN INTERFERENCES 



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UNITED STATES PATENT OFFICE. 



SEPTEMBER, 1878. 




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UNITED STATES PATENT OFFICE. 



rulp:s in intkrferexcp: cases. 



INTKKFKlil^NC^ES. 

51. An *• interference" is a i)roeee(ling" instituted for the interferences, 
purpose of (leterniinin,i>' tlie question of }))')(>}' ity of Inrention 
between two or more parties claiming tlie same patentable 
subject-matter. 

Before tlie declaration of an interference it is desirable 
that all lu'eliminary (piestions should be settled by the i^ri- 
niary examiner, and the issue must be clearly defined ; the 
invention Avhich is to fornr the subject of the controversy 
nmst be decided to be i)atentable, and the claims of the 
respective parties should be put in such condition that they 
will not reipiire alteration after the interference has been 
finally decided, unless the testimony adduced upon the trial 
shouhl necessitate such change. 

AYhere a i)arty who is required to i)ut his case in proper 
shape for the purposes of an interference delays doing so 
beyond a reasonable time specified, the interference will at 
once proceed. After final judgment of priority the applica- 
tion of such party will be held for revision and restriction, 
subject to interferen<?es with other applications or ]iew 
references. 

An interference will be declared in the following cases : when declared. 

Flrfit. When two or more parties have ap])lications pend- 
ing before the Office at the same time, and their respective 
claims conflict in whole or in i)art. 

Second. AVhen two or uiore a])plications are pending at 
the same time, in each of which a like patentable invention 
is shown or described, and claimed in one though not si^e- 
cifieally claimed in all of them. 

Third. When an appli('ant, having been rejected upon any 
unexpired X)atent, claims to have maile the invention before 
the patentee. 



Where a preliiiiiuary iutert'ereiice is declared on matter 
sliown but not claimed in the application last filed, the ap- 
plicant must, in order to avoid the continuance of the inter- 
ference, disclaim invention of the particular matter so shoAvn. 
Interferences 52. The fact that ouc of the parties has alreadj' obtained 

wi pa en s. ^ patent Avill not prevent an interference ; for, although the 
Commissioner has no power to cancel a i)atent already is- 
sued, he may, if he finds that another j)erson was the prior 
inventor, give him a patent also, and thus place both parties 
on an equal footing before the courts and the public. 

When a patent is involved in an interference the assignees 
as well as the inventor will be notified. 
Preliminary in- 53. Before the declaration of an interference proper a 

ceedings. ' preliminary interference will be declared, in which the pri- 
mary examiner will briefly and concisely define the inter- 
fering subject-matter, and specify the claims embracing 
the same; and also notify the respective parties when the 
applications of the other parties were filed, together with 
their names and residences. Each party to the interference 
Preliminary will bc required to file a brief statement under oath, showing 
the date of the original conception, the date that the inven- 
tion was reduced to di-aAvings or model, the date of its com- 
l)letion, and the extent of use. The parties will be strictly 
held in their i^roof to the dates set uj) in their preliminary 
statements. This statement must be sealed up before filing 
(to be opened only by the examiner of interferences), and 
the name of the i)arty filing it and the subject of the iin'en- 
tioii indicated on the envelope. 

These statements shall not be open to the inspection of 
the opposing parties until both have been filed, or until the 
time for filing both has expired ; nor then, until they have 
been examined by the proper ofdcer and found to be satis- 
factory. At the time of the examination of the preliminary 
statements the examiner of interferences will also make an 
examination of the preliminary declaration (instituted by 
the primary examiner), in order to ascertain whether or not 
the issue between the i^arties has been clearly defined. If 
it be found, upon such examination, that the preliminary 
declaration is ambiguous in this particular, the interference 
mil be suspended and the case returned to the primary 
examiner for amendment. 
Effect of prelim- If the party ui^on whom rests the burden of proof fails 
mary s a emen . ^^ ^^^ ^ preliminary statement, or if his statement fails to 
overcome the prima^acle case made by the respective dates^ 
of application, the other party will be entitled to an imme^ 
diate adjudication of the case upon the record. Or where 



tliere are more than two parties to the interference, and any 
of them fail to tile a preliminary statement, jnclgment may 
be rendered against such i)arties and the interference pro- 
ceed between the remaining i)arties. 

If the earlier applicant fails to file a preliminary state- 
ment, no testimony will subsequently be received from him 
going to prove that he made the invention at a date prior 
to his application. The preliminary statement can in no 
case be used as evidence in behalf of the party making it. 
Its use is to determine whether the interference shall be 
proceeded with^ and to serve as a basis of cross-examinai- 
tion for the other party. 

If either party requires a postponement of the time for 
filing the preliminary statements he must present his rea- 
sons therefor, in the form of an affidavit, i)rior to the day 
previously fixed upon. 

In case of material error in the preliminary statement, 
arising through inadvertence or mistake, it may be cor- 
rected, upon showing to the satisfaction of the Commis- 
sioner that its correction is essential to the ends of justice- 

The motion to correct the said statement must be made 
before the taking of the testimony relating to the alleged 
t'rror, and as soon as practicable after the discoA^ ery there- 
of; and it must be accompanied by notice to the adverse 
party or parties. 

54. Where no testimony is taken by the applicant upon Hearing of iu 
whom rests the burden of proof, or where testimony has 

been taken by such applicant but not by the other party 
during the time assigned to the latter, the case Avill be 
considered closed; ui^on motion duly made at the expira- 
tion of the time assigned to such parties, respectively, the 
case may be set for hearing at any time, not less than ten 
days thereafter. 

55. In cases of interference appeals may be taken to the 
examiners-in-chief and to the Commissioner, in the manner 
provided in Rule 48. 

5G. When an interference is declared, notice will be given Notice to par 
to both parties, or to their attorneys. When one of theence.''* ixitevtev^ 
parties has received a i)atent, duplicate notices A\dll be sent 
to the patentee and to his attorney of record. Where one 
of the parties resides abroad and has no known agent in the 
United States, in addition to the notice sent by mail, notice 
may be given by publication in the Official Gazette. official Gazette. 

57. In cases of interference the party who first filed so order in taking 

■I jy T • -«- «- testimony. 

much ot his application for a patent as is required by Eule 
7 will be deemed the first inventor in the absence of all 



proof to the contrary. A time will be assigned in which 
the other party shall comiilete liis direct testimony ; and a 
further time in which the adverse party shall complete the 
testimony on his side; and a further time in which the 
party who iirst took testimoin- may take rebutting testi- 
mony, but shall take no other. If there are more than two 
parties, the times for taking testimony will be so arranged 
that each shall have a like opportunity in his turn, each 
being held to go forward and prove his case against those 
who tiled their application before him. 

Postponement. 58. If it bccomcs ucccssary for either party to ha\'e the 
time for taking his testimony, or for the hearing, posti)oned, 
he must make application for such postponement, and must 
show sufficient reason for it by affidavit, as provided in Eule 
113, filed before the time x)reviously ai)pointed has elapsed, 
if practicable; and must also furnish his oi)i)onent with 
copies of his affidavits, and with reasonable notice of the 
time of hearing his motion. 

Motion to dis- 59. After the declaration of the interference, and before 
the time for filing the preliminaiy statements has expired, 
motions to dissolve the same, on the ground of lack of nov- 
elty, or that no interference in fact exists, or that there has 
been such other irregularity in declaring the same as will 
preclude the ])roper determination of the question of right 
between the parties, must be made before tlie examiner by 
Avhom the interference was instituted. After the declara- 
tion of interference such motion must be made before the 
tribunal having jurisdiction at the time. Appeal may be 
taken to the C'ommissioner in i)erson; luit if the examiner 
should decide that the subject-matter is not x)atentable in 
^^ew of the state of the art the interference will be dissolved, 
and the matter decided upon can be proceeded Avith ex parte. 

Proceedings After the declaration of the interference proper, it will 

after declaration x x 7 

proper. not be determined without judgment of priority founded 

upon the testimony or the Avritten concession of one of the 
parties. In their decision of the (piestion of priority, or be- 
fore such decision, the examiner of interferences or the ex- 
aminer-in-chief, as the case may be, will direct the attention 
of the Commissioner to any fact not relating to priority 
which may have come to their attention (by motion or other- 
wise), and which, in their opinion, amounts to a statutory 
bar to the grant of a patent to either or l)oth parties. After 
final judgment the primary examiner will consider and de- 
termine any such matters not previously disposed of by the 
Commissioner. 



If at an>' time (liiriiiti' tlie continuance of an interference 
tlie primary examiner discovers new references, he may 
request a suspension of the interference for their considera- 
tion; but, after testimony has been taken, ne\v parties ^^dll 
not l)e admitted into tlie interference. 

Where final judgment of priority has been rendered in 
favor of an apphcant whose application has passed to 
issue, the final fee been paid, and nothing more remains to 
be done but to issue the patent, the patent will not be with, 
held for the purpose of putting such application in interfer- 
ence with any application filed subsequent to the rendition 
of such judgment and the payment of said final fee; but a 
new interference may be declared with the patent. 

If judgment be based upon a concession of priority by 
eitlier of the parties, such concession must be in writing, 
and under the signature of the inventor himself; and if there 
has been an assignment, the assignee must join in the con- 
cession. 

60. Xo amentbnents to the si)ecification will be received Amendments, 
during the pendency of an interference, except as provided 

in section 61. A second interference will not be declared 
upon a new application on the same invention filed by either 
X)arty diuing the pendency of an interference, or after judg- 
ment, nor a rehearing be granted, unless it be shown to the Eehearinga. 
satisfaction of the Commissioner that the party desiring a 
new interference or rehearing has new and material testi- 
mony which he could not have i:)rocured in time for the 
hearing, or unless other wsufticient reasons be shown. 

61. When an aiii^lication is adjudged to interfere with a Partial interfer- 
l)art only of another pending api)lication, the interfering- 
parties will l)e permitted to see or obtain copies of so much 

only of the specifications as refers to the interfering claims. 
And either party may, if he so elect, withdraw from his 
application the claims adjudged not to interfere, and file a 
new application therefor: Provided,, That the claims so with- 
drawn coA^er inventions which do not involve the devices in 
interference: And provided also, That the devices in inter- 
ference are eliminated from the new ai>plication. In such 
case the latter will be examined without reference to the 
interference from which it was withdrawn. 



TAKIXCI AXD TRAXSMITTIXO TESTIMOXY. 

lb'3. In extension, interference, and other contested cases, 
the following rules have been established for taking and 
transmitting testimony : 



6 

Notice to be First. Before tlie deposition of ii witness or witnesses is 
^^^"* taken by either party, due notice shall he given to the oppo- 

site party, as hereinafter provided, of the time and place 
Avhen and where snch deposition or depositions Avill be 
taken, with the names and residences of the witness or wit- 
nesses then and there to be examined, so that the opposite 
party, either in i^erson or by attorney, shall have full oppor- 
tunity to cross-examine the witness or witnesses: Provided y 
That if the opposite party, or his counsel, be actually pres- 
ent at the taking of testimony, Avitnesses not liamed in the 
notice may be examined, but not otherwise ; and that neither 
party shall take testimony in more than one place at the 
same time, nor so nearly at the same time as not to allow 
reasonable time to travel from one place of examination to 
the other. 

Second. The notice for taking testimony mnst be served 
by delivering a copy to the adverse party, or liis agent or 
attorney of record or counsel, as provided in Rule 77, or by 
leaving a copy at the party's usual x>lat*e of residence with 
some member of the family who has arrived at the years of 
discretion, or by leaving the same at the office of the attor- 
ney; and such notice shall, with proof of service of the same, 
and a certificate duly sworn to, giving the manner and time 
of making the service, be attached to the deposition or de])o- 
sitions, whether the party cross-examine or not. 

Third. The magistrate before whom the deposition is taken 
nuist append thereto his certificate, stating tlie time and 
idace at which it was taken, the name of the witness, the 
administration of the oath, at whose request the testimony 
was taken, the occasion npon which it is intended to be 
used, the names of the adverse party (if any), and whether 
they were present ; and immediately upon tlie close of the 
examination he shall securely seal np all the evidence, &:c., 
and forward the same forthwith to the Commissioner of 
Patents, making njion the envelope a certificate giving the 
title of the case and the date of sealing and addressing the 
package. 

Fourth. (Relates to extensions.) 
Proceedings if Fifth. If either party shall be unable, for good and suffi- 

testimony cannot . "; , ,^ . ^' l- -^ -j. 

1)6 obtained. cieut reasous, to i)rocure th e testimony ot a witness or wit- 
nesses within the stipulated time, it shall be the duty of 
said party to give notice of the same to the Commissioner 
of Patents, accompanied by statements under oath of the 
cause of such inability, and of the names of such Avitnesses, 
and of the facts expected to be i^roved by them, and of the 
steins which have been taken to i^rocure said testimony, and 



of the time or times when efforts have beeu made to procure 
it ; which notice to the Commissiouer shall be received by 
him previous to the day of hearing aforesaid. Copies of the 
palmers, and notice of any motion based upon them, must also 
be served upon the opposite party, as provided in Enle 50. 

Sixth. Whenever a party relies ui)on a caveat to establish introducing ca- 

Tfoo^q 1* ft P O T* d ^ 

the date of his invention, the caveat itself, or a certified and books. 
copy thereof, must be filed in evidence, with due notice to 
the opposite party, as no notice can be taken by the Office 
of a caveat filed in its secret archiA^es. 

Tlie official records of the Office, and the books and docu- 
ments contained in the library, and other books in general 
circulation may be used at the hearing ; but notice of any 
si)ecial matter contained therein, ui^on which a x)arty relies, 
should be given to the opposite i>arty previous to the day 
set for closing testimony. 

114. The folios of each deposition must be numbered con- Deposit! on.s, 
secutively, and the name of the witness be plainly and con- ^^^ ^^^^^"^^ '^p- 
spicuously written at the top of each folio. It is deemed 
<lesirable that the testimony be taken u^^on legal cap paper, 

AAith a wide margin on the left-hand side of the page, and 
that only one side of the sheet be written ui^on. 

115. The testimony may be taken in narrative form j but, Form of testi- 
if either i^arty desires it, it must be taken in answer to in- 
terrogatories, having the questions and answers committed 

to \ATiting in theu" regular order by the magistrate, or, un- 
less by consent, by some person not interested in the case 
either as a party thereto or as attorney. The deposition, 
when comi)lete, must be signed by the witness. 

116. Xo evidence touching the matter at issue will be Excluding de- 
considered ux^on the day of hearing which shall not have ^^^^ ^°^^' 
been taken and filed in compliance with these rules ; but 

no notice will be taken of any merely formal or technical 
objection which shall not appear to have wrought a sub- 
stantial injury to the jiarty raising it ; and in such case it 
sliould be made to api)ear that, as soon as the party became 
aware of the objection, he immediately gave notice thereof 
to the Office, and also to the opposite party, informing him 
at the same time that, unless corrected, he shall urge his 
objection at the hearing; but this rule is not to be con- 
strued so as to modify well-established rules of evidence, 
Avhich will be applied strictly in all practice before the 
Office. 

117. Tlie law requires the clerks of the various courts of^g^^P^^^^^ ^"^^ 
the United States to issue subpoenas to secure the attend- 



H 

aiice of witnesses whose di^positioiis are desired to l)e read 
ill evidence of any contested case in the Patent Offit-e. 

Testimony. 118. In contestcd cases, whether of interference or of ex- 
whenopeu. tension, parties may have access to the testimony on tile 
prior to the hearing, in presence of the ofticer hi charge ; 
and copies may be obtained by them at the usual rates. 

Printing of it As a general rule i)rinte(l coi)ies of tlie testimony will be 
required ; but this requirement may be dispensed with on 
special ajqdication to the Commissioner, and showing satis- 
factory reasons tlierefor. 

After the testimony is tiled in the Oftice it will not be 
allowed to be withdrawn by the parties for the purpose of 
lu'inting; but the testimony maybe printed by some one 
si)ecially designated by tlie Office for that ])ur])ose, under 
proper restrictions. 

Three ])rinted copies should be furnished, two for tire use 
of the Oifice, and one tor tlie use of the opposing party. 
These cojues must l)e tiled not k'ss than one week ju-evious 
to the day of hearing. 

It is also desirable tliat all arguments sliould be submit- 
ted in printed form, and all arguments tiled at least two 
days previous to the day of hearing. 

Service of no- 77. Scrvicc of uoticc to take testimony may be made 
mony. upou ap])licant, ui)on the o])p()nent, u])on tlie attorney of 

record of either, or, if there be no attorney of record, ui>oii 
any attorney or agent who takes i)art in the service of 
notice or in the examination of the witnesses of either party. 
Where notice to take testimony has already been given to 
a]i opponent, and a new opponent subsequently gives notice 
of his intention to o])p()se, the examination need not be 
postponed, but notice thereof may be given to su<^h subse- 
(pient opponent by mail or by telegra])h. This rule, how- 
■ ever, does not ap])ly to ex-parfe examinations, or those of 
which no notice has been given when notice of opposition is 
served. 

Appeal in in- 48. Ill cases of interference paitics luivc the samc I'emedv 

terfereuce cases ; i . xi • • i • x- i xi /- 1 • • 

Boneto Supreme by a])peal to tlic examiiiers-in-chiet, and the Commissioner, 
as in e.r-jMrfe cases ; but no appeal lies in such cases from 
the decision of the Commissioner. Appeals in interference 
cases should be accompanied with a brief statement of the 
reasons therefor ; and both parties will be required to tile 
briefs of their arguments at least live dajs before the day 
of hearing. Printed briefs are in all cases preferred. 



HEAEIXGS. 

49. All cases i)endiiig before the Comiuissioiier, tlie board Hearings, rega 
of examiuers-iii-cliief, or the examiner hi charge of inter- 
ferences, will stand for argument at 1 o'clock on the day 

of hearing, nnless some other honr be specially designated. ^ 
If either party in a contested case, or the appellant in an 
ex-parte case, appears at that time, he ^^'i\\ be heard; bnt a 
contested case will not be taken \r^ for oral argument after 
the day of hearing, except by consent of both parties. If 
the engagements of the tribnnal before whom the case is 
l)ending are snch as to prevent it from being taken np on 
the day of hearing, a new assignment will be made, or the 
case ^\ill be continned from day to day nntil heard. Uidess 
otherwise ordered before the hearing begins, oral arguments 
vriW be limited to one honr for each connsel. After any 
case has been argued, nothing further relating thereto will 
be heard unless requested by the tribunal having the decis- 
ion of the case ; and all inter^icAvs for this purpose with par- 
ties in interest or their attorneys will be invariably denied. 

MOTIOXS. 

50. In contested cases, reasonable notice of all motions. Motions, regu- 
and copies of the motion, papers and affidavits, must ij^ ^^^^^°^ ^^^' 
served upon the opposite party or his attorney. Proof of 

such service must be made before the motion Tvill be enter- 
tained by the Office ; and motions will not be heard in the 
absence of either party except upon default after due notice. 
Motions will be heard in the first instance by the officer or 
tribunal before whom the particular case may be pending ; 
but an appeal from the decision rendered may be taken to 
the Commissioner in person. 

IIULES or COEEESPOXDEXCE. 
110. All correspondence must be in the name of the '' Com- correspondence 

^ T^ , ,, T TT 1 T 1 . yfi'^th Office^ how 

missioner oi Patents," and all letters and other commnmca- conducted, 
tions intended for the Office must be addressed to him, and 
postage must be prepaid in full. Communications will not 
be noticed if addressed to any of the other Officers, unless 
it be seen that the mistake was owing' to inadvertence. 

120. When an agent has filed his power of attornev, dnlv Correspondence 

* ^ . " ' " to be with party, 

executed, the correspondence Avill, in ordinarv cases, be held or attorney, oraa- 

•11- 1 TT1 -1 '^•-1 • signee, only. 

With hmi only; as a double correspondence with an assignee 
and the inventor, or with an attorney and his princii)al, if 
generally allowed, would largely increase the labor of the 



10 

Office. The assignee of an entire interest in an invention is 

entitled to liold correspondence with the Office to the exchi- 

sion of the inventor. 

Conflicting par- 123. Whenever it shall be found that two or more parties 

same tSunsei no^ wliosc interests are in conflict are represented by the same 

attorney, the examiner in charge will notify each of said 

principal parties, and also the attorney, of this fact. 

Information as 128. Information in relation to pending cases is given so 

to pending cases, ^ • , i • i •• >■% i • n •i 

when given. lar as it bccomes necessary m conducting the business of tlie 
Office, but no further. Thus, when an interference is de- 
clared between two pending applications, each of the con- 
testants is entitled to a knowledge of so much of his oppo- 
nent's case as to enable him to conduct his own understand- 
ingly. 
intercoiTrse 130. All busiiiess with tlic Officc sliould be transacted in 

oe in writing. Writing. Uiiless by the consent of all parties, the action of 
the Office will be based exclusively on the Avritten record. 
Xo attention will be paid to any alleged verbal promise or 
understanding in relation to wliich there is any disagree- 
ment or doubt. 



DEPOSITIOXS. 

Foini 47. Notice of taking testimony. 

Boston, Massachusetts, 

March 29, 18G9. 
In the matter of the interference between tlie application 
of A. B., for a paper-collar machine, and the patent Xo. 
85,038, granted December lo, 1868, to 0. 1)., now pending 
before the Commissioner of Patents. 
Sir : You are hereby notified that on AVednesday, March 
31, 1869, at the office of E. F., esq., No. 30 Court street, Bos- 
ton, Massachusetts, at nine o'clock in the forenoon, I shall 
X)roceed to take the testimony of O. H., J. K., and L. M., all 
of Boston, as witnesses in my behalf. 

The examination will continue from day to day until com- 
X>leted. You are invited to attend and cross-examine. 

A. B., 
By B. Q., 
His Afiorney. 



Providence J Bliode Lsland. 



11 

Proof of service. 

State of , County of , ss: 

Personally appeared before me, a justice of the peace, the- 
above-named A. B., "who, being duly sworn, deposes and 
says that he served the above notice upon O. P., the attor- 
ney of the said 0. D., at one o'clock p. m. of the 30th day of 
March, 1869, by leaving a copy at his office in Providence, 
Khode Island, in charge of his partner, E. S. 

A. B. 

Sworn to and subscribed before me this 31st day of 
March, 1869. 

(Service may be acknoAvledged h\ the party upon whom 
it is made as follows: 

Service of the above notice acknowledged. 

C. D., 
ByE.F., 
His Attorney.) 

FoKM 48. Deposition. 

Before the Commissioner of Patents, in the matter of the 
interference between the application of A. B., for a paper - 
collar machine, and the letters patent l^o. 85,038, granted 
December 15, 1868, to C. D. 

Depositions of witnesses examined on behalf of A. B., 
l)ursuant to the annexed notice, at the office of E. F., ^o. 
30 Court street, Boston, Massachusetts, on AYednesday, 
March 31, 1869. Present, S. T., esq., on behalf of A. B., 
and Y. W., esq., on behalf of C. D. 

G. H. (1.)* 

G. H., being duly sworn (or affirmed), doth depose and 
say, in answer to interrogatories proposed to him by S. T., 
esq., counsel for A. B., as follows, to wit: 

Question 1. What is your name, age, residence, and occu- 
l)ation ? 

Answer 1. Mv name is G. H.; I am fortv-three vears of 
age; I am a manufacturer of x>aper collars, and reside in 
Chelsea, Massachusetts. 

Question 2, &c. # * # # # 

And in answer to cross-interrogatories proposed to him 
by Y. AY., esq., counsel for C. D., he saith : 

Cross-question 1. How long have you known A. B. ? 

G. H. 

(^ See Rule 114.) 



12 
Form 49. Certificate of officer. 

(To follow deposition.) 

State of — , County of ^ ss: 

At Boston, ill said comity, on the 31st day of Marcli, 
A. D. 18C9, before me personally appeared the above-named 
G. H., and made oath that the foregoing deposition, by him 
subscribed, contained the truth, the whole truth, and noth- 
ing but the truth. The said deposition is taken at the re- 
quest of A. B., at the time and place named in the notice 
hereto attached, to be used upon the hearing of an interfer- 
ence between the claims of the said A. B. and those of C. 
D. before the Commissioner of Patents on the 3d day of 
May, A. D. 1860. 

The said C. D. was duly notified, as appears by the origi- 
nal notice, hereto annexed, and attended l>y V. W., esq., his 

counsel. 

E. F., 

Justice of the Peace. 

The magistrate shall then append to the deposition the 
notice under which it was taken, shall seal up tlie testimony 
and direct it to the Commissioner of Patents, ])lacing upon 
the envelope a certificate in substance as follows : 

I herebji certify that the within deposition of G. H. [if 
the package contains more than one deposition, give all the 
names], relating to the matter of interference between A. B. 
and C. D., was taken, sealed up, and addressed to the Com- 
missioner of Patents bv me this 20th day of April, A. D. 1869. 

E. F., 
Justice of the Peace. 



V 
13 



The Official Gazettf: of the United States Patent Office, pnhlished weekly, contains? 
all important decisions of the Commissioner of Patents, and decisions of United States 
courts in patent and trade-mark causes. Also a list of all patents issued and all trade- 
marks and labels registered. The claims in full of all x>ateuts are i^uhlished in the- 
Gazette, together with such a x^ortion of the drawing and brief description as "will 
give a general idea of the invention. Subscription price, established by law, six dol- 
lars per annum. 

Patent-Office coupons, wliich purchase a copy of any drawing which has been photo- 
lithographed, are sold singly by the Patent Office at twenty-five cents each, or twentj 
coupons at one time for two dollars. Where specifications are in x^rint they are fur- 
nished with the drawings without extra charge. 




LIBRARY OF CONGRESS 



028 030 943 



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